A city is a game mechanic. It's an entity type. If you want to construct a facility, your location must be a City entity. So a lot of people have placed additional cities ready for building in them, and either not gotten around to it, or not had the money to do so.

So a city DOES have features. But those features are the ability to build facilities and roads in it.

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"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."